Home / 12,190.40-18,285.60-10,440.80

Finding the Fourth Proportional to 12,190.40, 18,285.60 and 10,440.80

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Solution

The fourth proportional to 12,190.40, 18,285.60 and 10,440.80 is: 15,661.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,190.40 : 18,285.60 = 10,440.80 : x
  2. Step 2: Convert to fraction form
    12,190.40/18,285.60 = 10,440.80/x
  3. Step 3: Cross multiply
    12,190.40x = 18,285.60 × 10,440.80
  4. Step 4: Simplify right side
    12,190.40x = 190,916,292.48
  5. Step 5: Solve for x
    x = 190,916,292.48/12,190.40
  6. Step 6: Final answer
    x = 15,661.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.